For immunofluorescence, cells were fixed with 4% paraformaldehyde and permeabilized in 0.3% Triton X-100. Antibodies included rabbit anti-TLX (1:1,000; Shi lab)45 (link), mouse anti-nestin (1:2,000; BD Pharmingen; Catalogue # 611659)55 (link), rabbit anti-integrin αv (1:500; Chemicon; Catalogue # AB1923)43 (link), mouse anti-neuropilin-1 (1:11; Miltenyi Biotec; Catalogue # 130-090-693)43 (link), mouse anti-GFAP (1:1,000; Sigma; Catalogue # G3893) and rabbit anti-Tuj1 (1:6,000; Covance; Catalogue # PRB-435P)56 (link).
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